BaseFortify

Publication date: 2025-10-22

Last updated on: 2025-10-27

Assigner: GitHub, Inc.

Description

pypdf is a free and open-source pure-python PDF library. Prior to version 6.1.3, an attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires parsing the content stream of a page which has an inline image using the DCTDecode filter. This has been fixed in pypdf version 6.1.3.

CVSS Scores

EPSS Scores

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Meta Information

Published

2025-10-22

Last Modified

2025-10-27

Generated

2026-07-06

AI Q&A

2025-10-23

EPSS Evaluated

2026-07-05

NVD

CVE-2025-62707

Affected Vendors & Products

Vendor	Product	Version / Range
pypdf_project	pypdf	to 6.1.3 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-834	The product performs an iteration or loop without sufficiently limiting the number of times that the loop is executed.

Attack-Flow Graph

Executive Summary

This vulnerability in pypdf versions prior to 6.1.3 allows an attacker to craft a specially designed PDF containing a page with an inline image using the DCTDecode filter. When this PDF is parsed, it can cause the library to enter an infinite loop during content stream parsing.

Impact Analysis

The impact of this vulnerability is that processing a maliciously crafted PDF can cause the application using pypdf to hang or become unresponsive due to an infinite loop, potentially leading to denial of service.

Mitigation Strategies

Update pypdf to version 6.1.3 or later, as this version contains the fix for the infinite loop vulnerability caused by parsing PDFs with inline images using the DCTDecode filter.

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